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Table 4 Comparison of sound levels between different ICU units and shifts

From: Associations between stressors and difficulty sleeping in critically ill patients admitted to the intensive care unit: a cohort study

Type of ICU Global ICU stay Morning shift Afternoon shift Night shift
General ICU
1 62.95 ± 1.89 64.08 ± 2.99 62.66 ± 2.18 62.12 ± 1.10
2 64.63 ± 2.36 66.40 ± 3.25 64.00 ± 1.56 63.50 ± 2.26
3 60.41 ± 5.22 60.92 ± 5.24 60.92 ± 6.06 59.40 ± 4.40
4 63.63 ± 1.03 64.52 ± 1.97 64.20 ± 1.04 62.17 ± 0.88
5 59.56 ± 7.47 62.22 ± 1.79 58.54 ± 10.22 57.92 ± 10.91
6 61.66 ± 3.30 62.90 ± 1.63 61.70 ± 3.61 60.40 ± 2.59
7 63.20 ± 0.83 63.24 ± 1.49 64.02 ± 1.80 62.34 ± 1.15
8 60.80 ± 0.52 60.75 ± 0.64 61.40 ± 2.55 60.25 ± 3.46
Step-down unit
9 61.56 ± 1.88 60.95 ± 3.28 61.60 ± 1.83 62.15 ± 0.79
10 61.56 ± 0.91 60.60 ± 1.21 62.48 ± 1.90 61.62 ± 1.02
11 63.43 ± 2.40 61.95 ± 1.57 62.48 ± 1.27 65.86 ± 6.42
12 63.86 ± 1.65 63.52 ± 2.55 64.00 ± 1.36 64.06 ± 2.19
13 65.15 ± 1.93 64.22 ± 1.06 65.48 ± 2.79 65.76 ± 3.17
14 62.02 ± 0.32 62.11 ± 0.56 62.23 ± 2.57 61.71 ± 2.06
15 61.16 ± 1.11 61.33 ± 2.29 61.65 ± 1.59 60.50 ± 1.40
16 60.62 ± 2.12 60.25 ± 2.94 60.95 ± 1.99 60.68 ± 3.32
Total 62.25 ± 2.93 62.33 ± 2.62 62.38 ± 3.60 62.03 ± 4.23
  1. The data are expressed as mean dB ± standard deviation